This has been the situation on QM2 since she returned to service and discussed in several threads here.
The "new" system of 2 fixed sittings and open dining hasn't started on QM2 yet.
"Open Dining will be available from 3 October 2022 on Queen Elizabeth, 23 October 2022 on Queen Victoria, or 1 November 2022 on Queen Mary 2. Check My Cunard to choose your preferred dining time before you sail."